Accessory Maxillary Ostia: Anatomical and Clinical Relevance From a Cadaveric Case Report.

Area of Science:

• Anatomy
• Otolaryngology
• Surgical Anatomy

Background:

• Accessory maxillary ostia (AMOs) are common anatomical variations of the paranasal sinuses.
• They are typically small openings near the maxillary sinus, found in various locations within the nasal cavity.

Observation:

• A unique case of bilateral AMOs was discovered during routine nasal cavity dissection in an 84-year-old female cadaver.
• Three AMOs were identified: two on the left (7x4mm and 5x3mm) and one on the right (7x4mm), with distinct positional relationships to the semilunar hiatus.
• A soft, nodular growth was noted within the left maxillary sinus, while the right remained unremarkable.

Findings:

• This report details a rare presentation of multiple AMOs on one side, alongside an unusual nodular growth within the maxillary sinus.
• The dimensions and precise locations of the observed AMOs provide valuable anatomical data.

Implications:

• This case highlights the importance of recognizing anatomical variants like AMOs for endoscopic sinus surgeons.
• The findings may offer insights into the etiology of multiple AMOs and their potential association with maxillary sinus pathologies.
• Further research could explore the link between AMOs and nodular growths in the maxillary sinus.